walking your dog

Best definition
walking your dog
Used to convey that you understand what someone’s telling you. Can also be used as an acknowledgement.
Acknowledgement example:

Ruban: “OK, so when you’re done making those lattes, can you bus the cafe?”

Joanna: “Yeah man, totally. I’m walking your dog.”

Understanding example::

Ho-Jin: “Alright, so 2 + 2 is 4. Does this make sense?”

Sudthakar: “Yeah, for sure. I’m walking your dog!”